Furnace maintenance: polish the flame sensor. Flushed the condensation p-trap and condensation lines. Inspected the pressure switch lines. Tighten the bolts on the exhaust gasket. Successfully completed diagnostic testing in both first and second stage. Adjusted second stage gas pressure to meet manufacturer requirements. System is operating well. Fireplace maintenance: successfully completed fireplace maintenance. Stripped the firebox and cleaned the surroundings. Cleaned off ceramic logs. Cleaned out the pilot assembly. System is operating beautifully. Happy Holidays,